Chae Yeon-Ji, Oh Hye-Ji, Chang Kwang-Hyeon, Kwak Ihn-Sil, Jo Hyunbin
Department of Environmental Science and Engineering, Kyung Hee University, Yongin 1732, Korea.
Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Korea.
Animals (Basel). 2021 Feb 19;11(2):542. doi: 10.3390/ani11020542.
The gut bacterial communities of copepods can affect metabolic processes, and consequently, their activity can be related to the release of organic substances to the environment. Hence, they are important for organic matter cycling in marine coast food webs. However, information regarding the variation in gut bacterial communities based on copepod species and environmental variations is limited. We analysed the differences in gut bacterial communities from dominant copepod species, i.e., , and , in a brackish reservoir. The core bacteria among the copepod species and locations consisted of the following main operational taxonomic units (OTUs): and the family Rhodobacteraceae belonging to Alphaproteobacteria, which is abundant in seawater and freshwater aquatic ecosystems as a zooplankton-associated bacterial community. The bacterial community composition of each copepod (except the core species) showed high variability. The bacterial community diversity differed depending on the copepod species and the sites' environmental conditions, especially salinity, e.g., compositional variations in the bacterial community of were high at sites with low salinity. Therefore, the gut bacterial community of each copepod species responds differently to the environment.
桡足类动物的肠道细菌群落会影响代谢过程，因此，它们的活动可能与向环境中释放有机物质有关。因此，它们对海洋沿岸食物网中的有机物质循环很重要。然而，关于基于桡足类物种和环境变化的肠道细菌群落变化的信息有限。我们分析了咸淡水水库中优势桡足类物种（即 、 和 ）肠道细菌群落的差异。桡足类物种和地点中的核心细菌由以下主要操作分类单元（OTU）组成： 以及属于α-变形菌纲的红杆菌科，作为与浮游动物相关的细菌群落，它在海水和淡水水生生态系统中含量丰富。每种桡足类动物（核心物种除外）的细菌群落组成表现出高度变异性。细菌群落多样性因桡足类物种和地点的环境条件而异，尤其是盐度，例如，在低盐度的地点， 的细菌群落组成变化很大。因此，每种桡足类物种的肠道细菌群落对环境的反应不同。
